#include<bits/stdc++.h>
#define ll long long
#define int ll
#define L x<<1
#define R x<<1|1
#define mid (l+r>>1)
#define lc L,l,mid
#define rc R,mid+1,r
#define OK Ll<=l&&r<=Rr
#define Root 1,1,tp
#define rep(x,y,z) for(int x=(y);x<=(z);x++)
#define per(x,y,z) for(int x=(y);x>=(z);x--)
#define repn(x) rep(x,1,n)
#define repm(x) rep(x,1,m)
#define pb push_back
#define e(x) for(int i=h[x],y=to[i];i;i=nxt[i],y=to[i])
#define E(x) for(auto y:p[x])
#define Pi pair<int,int>
#define ui unsigned ll
inline int read(){int s=0,w=1;char c=getchar();while(c<48||c>57) {if(c=='-') w=-1;c=getchar();}while(c>=48&&c<=57)s=(s<<1)+(s<<3)+c-48,c=getchar();return s*w;}
inline void pf(int x){if(x<0) putchar('-'),x=-x;if(x>9)pf(x/10);putchar(x%10+48);}
using namespace std;
const int N=2e5+10,M=7e6+5,inf=(1LL<<31)-1,mod=998244353;
const ll llf=1e18;
inline void add(int &a,int b){((a+=b)>=mod) and (a-=mod);}
inline int Add(int a,int b){return add(a,b),a;}
inline int mul(int a,int b){return 1LL*a*b%mod;}
inline void Mul(int &a,int b){a=mul(a,b);}
inline void red(int &a,int b){add(a,mod-b);}
inline int Red(int a,int b){return red(a,b),a;}
inline int qp(int a,int b){if(!b)return 1;int c=qp(a,b>>1);Mul(c,c);if(b&1)Mul(c,a);return c;}
inline int INV(int x){return qp(x,mod-2);}
int n,ct[N],t[N],val[N],m,sm,k,Tm[N],Val[N];
int ans;
inline void dfs(int pos,int T,int w){
	ans=max(ans,w);
	if(pos==n+1)return;
	for(int i=0;i<=ct[pos]&&t[pos]*i+T<=m;i++)dfs(pos+1,T+t[pos]*i,w+val[pos]*i);
}
int dp[N];
inline void Main(){
	n=read();
	repn(i)ct[i]=read(),sm+=ct[i];
	repn(i)t[i]=read();
	repn(i)val[i]=read();
	m=read();
	if(sm<=20){
	dfs(1,0,0);	
	cout <<ans;
	return;
	}
	repn(i){
		int now=1;
		while(1){
			if(ct[i]>=now)k++,Tm[k]=t[i]*now,Val[k]=val[i]*now,ct[i]-=now;
			else {
				if(!ct[i])break;
				k++,Tm[k]=ct[i]*t[i],Val[k]=ct[i]*val[i],ct[i]=0;
			}
		}
		now<<=1;
	}
	rep(i,1,k){
		per(j,m,Tm[i])dp[j]=max(dp[j],dp[j-Tm[i]]+Val[i]),ans=max(ans,dp[j]);
	}
	cout <<ans;
}
signed main(){
	freopen("book.in","r",stdin);
	freopen("book.out","w",stdout);
	int T=1;
	while(T--)Main();
	return 0;
}